Traffic trestle



June 17, 192.4,

G* J. STILLMAN TRAFFIC TRESTLE Filed July 19 1922 4 Sheets-Sheet 1 m-TEH a /l w gmxantoc 'Msg-fb..

George zZStzman G. J. STILLMAN TRAFFIC TRESTLE Jung 17, 1924.

Filed July 19, N322 4 Sheets-$heetl 2 June 17, 1924. v 1,497,703

G. J. STILLMAN TRAFFI C TRESTL E Filed July 19, 1922 4 Sheets-Sheet 5 (Jn/venin@ George J. Stillman June 17, 1924.

G. J. STILLMAN TRAFFI C TRESTLE Filed July 19 1922 4 Sheets-Sheet 4 Patented June 17, 1924. i

UNITED STATES PATENT OFFICE.

GEORGE J. STILLMAN, 0F' JERSEY CITY, NEW JERSEY'.`

TRAFFIC TRE STLE.

Application led July 19, `19522.

To all whom t may concer/a:

Be it knownrthat I, GEORGE J. STILLMAN, a citizen of the United States, residing at Jersey City, in the county ofHudson and State ofNew Jersey, have invented new and useful Improvements `in Traffic 'lf/restlos, of ywhich the following is a specification.

This invention relates to traffic trestles.

The primary object of this invention resides in the provision of a traflic trestle consisting of a stationary platform and inclined platforms adapted tobe elevated at one end to permit the passage'of traflicv on one thoroughfare to pass over that of an intersecting thoroughfare.

Anotherobject of thisinvention resides inthe provision of a traffic trestle consisting of a stationary vplatform having inclined platforms which arci manipulated from a substantially horizontal position,.level with the thoroughfare,'.to an inclined position, connectin the thoroughfare with the stationary p atform. j A

A still further: object of this. invention resides in the provision of a traffic tre-stle consisting oflan elevatedl stationary platform, inclined movable plat-forms and means whereby one end 'of each movable inclined platform can be elevated in operative alignment with the stationary platform.

A further object of this invention residesin the provision of a traic trestle consisting of a stationary platform, and movable inc'lined platforms, the latter of which embodying co-.operative elements whereby they can be elevated and locked .in operative alignment with the stationary platform. y l

Aside from the'foregoingv objects, this vinvention consists of a stationary platform having inclined platforms adapted to be elevated atA their innerv ends in (zo-operative relation with the stationary platforms and connected with means for controlling-railings beside the surface pits from which the inclined platforms are elevated. In addition to the foregoing objects, this invention resides in the provision of a stationary platform having movable platforms at opposite ends thereof adapted to elevate guard-rails on the sides of the pits forthe movable platforms during the elevation `of the movable platforms.

Withthese and other,objects in view, this invention resides in certain novel features of construction and arrangement Vof ele-v Serial No. 576,115.

ments to be Vhereinafter more specifically. 'set forth in the specification," illustrated inthe accompanying drawings-and pointed out in the Vappended claims.

In the accompanying drawings--` Figure '1 is a side Jview of a'traffic trestle as constructedV in accordance with this invention. i

Fig. 2 is a planview thereof.

Fig. 3 is a longitudinal sectionalview on une-Queer Fig. 9 isa .sectional view on Fig. 8.

Fig. 10-is a sectionalA view Online 10--10 of Fig. 8.

Fig. 11 is a sectionalview on line 11-11 of Fig. 10. Fig. l2 showing other means for elevating and supporting.v the inclined platforms thereof.l

Fig. 13 is an enlargeddetail view showing one movable supporting standard of the inclined platforms as illustrated in Fig. 12.

Fig. 14C is a detail viewpof the connection provided` for the auxiliary. standards illustrated in Fig. 12. n

Fig. 15 is. a detailview showing th latches for the hydraulic hoistsi;

Fig. 16, is a diagrammatic view illustrating the guard rail manipulating means as operated by the movable platforms; 1

Fig. V17 is a detail sectionalview of one end of one of the guard-rails;

Fig. 18 shows a trestle wherein the incline platforms are stationary. j

In the present embodiment` of this invention the numeral 5 designates a stationary platform which is 'preferablyy elevated above intersecting thoroughfares or road ways, and supported by suitable standards 6V located out of. the path of Utraiiic when passing on the-surfacebeneath the stationary platform...

Adjacent each end ofthe stationary platis aside view ofa traflic trestle B., i Y 1,497,703

form and in thethoroughfare are aligning elongated pits (R) in which are normally disposed the inclined platforms 7 which when elevated at their inner ends form' means whereby the traffic, of that thoroughfare aligning therewith, is directed over the intersecting throughfare over which the i' stationary platform extends.` These inclined ,platforms 7. f e Y Pivotally secured to the guide-blocks:9.Y

platforms when in. their normal lowered positions entirely Close their respective pits and form unobstructed continuations be tween the disconnected edges Vofthe thoroughfare, necessarily produced in excavating the pits. .Y

Suitably secured tothe standards are guide-rails 8 upon which are slidably secured guide-blocks 9 for directing the -main hydraulichoists 1 in vertical planes andV thus guidel the innrfV ends oft-he inclined as at are the side beams 12 of the inclined platforms-7, whilesuitably secured throughout the lengths of the side beams 12er-e the pivotally secured heads 13 of auxiliary hydraulic hoists 14. ,f A Y Supported by thestationary structure forming the trestle is a suitable pump, (S)

which is connected with'the-main Yand auxiliary hydraulic hoists by pipes 15,v and -kwhen suitablef controlling means are disposed: to causel thepump to operate, -the in- ';.clined platforms'.will Y.be 4manipulated through the instrumentality of the hydraulic hoistsf V 51e-Ona" a Samia/ae innata par- Y forms in elevatedpositions, suitable latches l'engage the guide-blocks Sand release the samethrough the instrumentalityof means lcontrolled by the pump.V L

Onthe lower ends .of the inclined -platforms are suitable trucks 17 adapted toper- Ymit. said platforms Vto have la-slightsliding i' 'carry beams 26: which rmust be extended after theplatfolmis. raised so that they-will bein proper positions to rest on suitable standardsY 27 provided for supportingfthe inclined plat'formsrin. elevated position The laforesaid Vbeams. are. heldin extended posi Yions suit-ablemeans, whichiin this lllstanareiiins28- t Secured to the aforesaid ,windlasses 2O are cablesor chains `29 which fp'ass. over pulleys 30 'and -connect with'the adjacent'ends of the/inclined platforms, to sbe moved, and

upon the same reaching the desired eleA vated positions, a tongue 31 carried by each inclined platform engages a companion tongue 32 carried by the stationary platform, thus providing 'means whereby the platforms are locked together.

Hingedly secured to the inclined plat forms 25 are hand-rails 33 which when folded are disposed beneath the platforms so as to be directed within the pit provided for the platform when in lowered position. These rails are held in elevated or operative position by any suitable means such as indicated at 34.

,In the forms shown in Figs. 12 to 13, in addition to the main hydraulic hoists and the latches operable thereby, they inclined platforms are provided with pivoted standards 35 which project within guide-holes 3G when the platforms are lowered and manipulated to rest upon suitable retaining supports 36 while the platforn'is are elevated.

In order toV prevent pedestrians from ac cidentally stepping into the pits R while the inclined plat-forms are elevated, guardrails 40 areV disposed adjacent the opposite sides of the pits, the same preferably being capable of disappearing when the inclined platforms areV lowered within the pits. Aside from the hydraulic means shown in Fig. 3 to manipulate the guard-rails, the simplest and most accurately controlled mechanismconsists of cables 41 and guide pulleys 42, the former of which being connected to the incl-ined platforms, sothat, as it rises, thel cableswill ejectfthe guardfrails vfronntheir housings beneath thcl surface of theground.

In the form shownin Fig. 18,V a` trestle is illustratedashaving immovable inclined platforms, this particular structure being adapted for permanently spanning` intersecting thoroughfares.

With this inventionA fully setforth.y it is manifesta trestle of great utility is provided,A and through the provision of its simplicity, the operating expense thereof will be reduced to-the minimum. 4Having thus described my invention what I claim and desire to protect by Letters Pat cutis:

A 1. The combination with a -stationary platform, standards supporting vthe said platform, pits adjacent the opposite ends thereof. other platforms located in theipits and slidably connected to the standards. elevatingrmeans connected to the inner ends of thelsecond mentioned platforms. hand-rails adjacent the sides of the pits and connections between the latter mentioned platforms and handfrails, whereby the rails will be raised simultaneously with the latter mentioned platforms.

2. The combination with a stationary platform, standards supporting said platlli platforms disposed in pits on opposite sides of the stationary platform with their inner ends in slidable relation With the adjacent ends of the stationary platform, and elevating means connected to the second men'- tioned platforms.

In testimony whereof I ax my signature.

GEORGE J STILLMAN. 

